Which of the following statements are correct with reference to packaging of DNA helix ?
A. Histones are organized to form a unit of eight molecules called histone octamer.
B. Histones are negatively charged basic proteins.
C. Histones are rich in the basic amino acid residues - lysine and arginine.
D. The positively charged DNA is wrapped around the histone octamer to form nucleosome.
E. The packaging of chromatin at higher levels requires an additional set of proteins called non-histone chromosomal proteins.
Choose the correct answer from the options given below :
The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is $\_\_\_\_$
Which chromosome in the human genome has the highest number of genes?
Match List-I with List-II
| List - I |
List - II |
||
|---|---|---|---|
| A | Alfred Hershey and Martha Chase | I | Streptococcus pneumoniae |
| B | Euchromatin | II | Densely packed and dark-stained |
| C | Frederick Griffith | III | Loosely packed and light-stained |
| D | Heterochromatin | IV | DNA as genetic material confirmation |
Choose the correct answer from the options given below:
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